发明名称 |
Four zone multifocal lenses |
摘要 |
The present invention provides multifocal lenses containing at least four zones of different refractive power. The zones are positioned such that the wearer is able to use the inferior-most portion of the lens to more clearly, as compared to conventional multifocal lenses, view objects at distances more than 45 cm from the eye.
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申请公布号 |
US2004233384(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
US20030440967 |
申请日期 |
2003.05.19 |
申请人 |
GUPTA AMITAVA;SASTRY SHYAMY;WOOLEY C. BENJAMIN |
发明人 |
GUPTA AMITAVA;SASTRY SHYAMY;WOOLEY C. BENJAMIN |
分类号 |
G02C7/02;G02C7/06;(IPC1-7):G02C7/06 |
主分类号 |
G02C7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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